Waec Biology Past Questions and Answers

Question 1831:

• WAEC 1988

Which of the following major ideas were proved by Gregor Mendel?

A. There is a tendency among organisms `to increase rapidly in number if conditions are favourable
B. There is a struggle for existence among a very large number of offspring
C. Nature selects organisms which will survive to produce their kind
D. All species exhibit structural and functional variations
E. Characteristics of an organism are controlled by genes occurring in pairs

Question 1832:

• WAEC 1988

Assuming that ‘A’ is gene for normal skin and it is dominant, while ‘a’ is gene for albinism and it is recessive,
what is the likely genotype of a couple which had 50% normal and 50% albinos?

A. AA,Aa
B. AA,aa
C. Aa, Aa
D. Aa, aa
E. AA,AA

Question 1833:

• WAEC 1988

Which of the following is not a constituent of DNA?

A. Purine
B. Phosphate
C. Cystocine
D. Deoxyribose
E. Uracil.

Question 1834:

• WAEC 1988

Which of the following best describes the homologous chromosomes? They are

A. A product of the division of a chromosome
B. Two identical chromosomes from each parent
C. Chromosomes arranged on spindle fibres during cell division
D. Daughter chromatides formed during meiotic division
E. Chromosomes during telophase of mitotic division

Question 1835:

• WAEC 1988

The haploid number of chromosomes in man is

A. 48
B. 46
C. 42
D. 24
E. 23